Question

Simplify (3k - 4r - 2m)square​

Answer 1

ANSWER

48kr + 32rm

Explanation

(3k- 4r- 2m)² (3k + 4r - 2m)²

=[(3k)²+(-4r)²+-(2m)²+{2×(3k)×

(-4r)}+{2×(-4r)×(-2m)}+{2×(3k)×

(-2m)} ] - [(3k)² + (4r)² +(-2m)²+

{2×(3k)×(4r)} +{2×(4r)×(-2m)}+

{2×(3k)×(-2m)}]

{ (a+b+c)²=a²+b²+c²+2ab+2bc+2ac }

=[9k²+16r²+4m²+{- 24kr} +{16rm}+ {-12km}]

-[9k²+16r²+4m²+{24kr} +{-16rm }+{- 12km} ]

=9k²+16r²+4m²-24kr+16rm-12km-9k²-

16r²-4m²-24kr+16rm+12km

=48kr+32rm